"Dad? What the hell is going on?" Jon asked.
"Dad? Jane, do I look like your father to you?" Jon's father asked.
Why did he call him Jane? That was his mother's name. Then realization came to him. Maybe he called him Jane because he was Jane. Jon slowly looked down at himself and nearly screamed when he realized that it was true. He had his mother's body.
This must have had something to do with that vague wish he made the previous night. But if Jon was his mother, what happened to his mother? Was she Jon now?